Membrane-associated proteins are proteins that are located on or near the cell membrane, playing crucial roles in various cellular functions. They can be classified into two main types: integral proteins, which are embedded within the membrane, and peripheral proteins, which are attached to the membrane's surface. These proteins are essential for processes such as signaling, transport, and maintaining the cell's structure. These proteins interact with other molecules, including lipids and carbohydrates, to facilitate communication and transport across the membrane. Membrane-associated proteins are vital for the proper functioning of cells and are involved in many biological processes, including those related to cell signaling and immune response.